Polaris

1Alp UMi

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Polaris holds the Alpha designation in Ursa Minor, the Little Bear, and is additionally listed as 1 Ursae Minoris in the Flamsteed system. It is a yellow-white F-type star, an intermediate spectral class whose colour index of 0.636 reflects a surface cooler than white A stars but warmer than the orange K types. Though it appears at a moderate apparent magnitude of 1.97, its absolute magnitude of −3.64 reveals substantial intrinsic luminosity, a brightness muted by its distance of some 433 light-years. That gap between apparent and true brightness is typical of luminous stars observed across several hundred light-years of space.

Propriedades físicas

Classe Espectral F Class F — F-type (Yellow-White)
Índice de cor (B−V) 0,636

Observação

Magnitude Aparente +1.97
Magnitude Absoluta -3,64
Distância 433 ly

Posição

Ascensão reta 2h 31,79m
Declinação 89° 15,85′

Related Chemistry

Explore the chemical elements connected to Polaris on our sister site ChemFYI.

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Frequently Asked Questions

What type of star is Polaris?
Polaris is a Class F — F-type (Yellow-White) star.
How far is Polaris from Earth?
Polaris is approximately 432.6 light-years from Earth.
Can you see Polaris with the naked eye?
With an apparent magnitude of 1.97, Polaris is visible to the naked eye.